Method and device for evaluating scale inhibition performance of water treatment chemicals

Abstract

The invention discloses a method and device for evaluating the scale inhibition performance of a water treatment agent. A saturated calomel electrode and a conductivity electrode are fixed in holes in two sides of a three-neck flask separately; an electric stirrer is fixed in a hole in the middle of the three-neck flask; the three-neck flask in a thermostatic water bath kettle; the electric stirrer and the thermostatic water bath kettle are connected with an external power supply separately; two connection lines of the conductivity electrode are connected with an auxiliary electrode wire and a working electrode wire of an electrochemical workstation separately; the connection line of the saturated calomel electrode is connected with a reference electrode wire of the electrochemical workstation; and the electrochemical workstation is connected with a control host through a line. The invention further specifically discloses the method for evaluating the scale inhibition performance of the water treatment agent. The method is simple in operation, short in used time and wide in application field; and an effective and fast evaluation method is provided for development, selection and combination of a scale inhibitor.

Description

technical field [0001] The invention belongs to the technical field of performance evaluation methods of scale inhibitors, and in particular relates to a method and device for evaluating the performance of scale inhibitors for water treatment. Background technique [0002] Scaling problems of pipelines and equipment generally exist in industrial production, such as thermal power, petroleum and electronics. In the circulating cooling water system, there are many scale-causing ions in the water, such as Ca 2+ , Mg 2+ , CO 3 2- and SO 4 2- . During the operation of the circulating cooling water system, these inorganic ions will be concentrated several times (2 to 8 times), so that the scale-causing ions will crystallize and grow and attach to the surface of the equipment to form a mineralized scale layer, which seriously affects the replacement of the circulating cooling water system. thermal efficiency, and even lead to the paralysis of the entire system. Adding scale ...

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Problems solved by technology

[0007] In order to overcome the shortcomings of the traditional static method that cannot reflect the dispersion and lattice distortion of scale inhibitors and the dynamic method with complex equipment and long test time, the present invention provides a method and device for evaluating the scale inhibition performance of water treatment chemicals. Invented the use of a three-necked flask for fixed electrodes and an electric stirrer, and successfully realized the rapid evaluation of the scale inhibition performance of scale inhibitors by using the potentiodynamic polarization test method

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